Pith Number

pith:PLFE4ALG

pith:2012:PLFE4ALGLJXVBDWXN4PUYXDPLO

not attested not anchored not stored refs pending

Reflection from a moving mirror - a simple derivation using the photon model of light

Aleksandar Gjurchinovski

arxiv:1207.0998 v2 · 2012-07-02 · physics.class-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PLFE4ALGLJXVBDWXN4PUYXDPLO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:39:43.460157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7aca4e01665a6f508ed76f1f4c5c6f5b927d35892cbc09d3e778c36b60d48345

Aliases

arxiv: 1207.0998 · arxiv_version: 1207.0998v2 · doi: 10.48550/arxiv.1207.0998 · pith_short_12: PLFE4ALGLJXV · pith_short_16: PLFE4ALGLJXVBDWX · pith_short_8: PLFE4ALG

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PLFE4ALGLJXVBDWXN4PUYXDPLO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7aca4e01665a6f508ed76f1f4c5c6f5b927d35892cbc09d3e778c36b60d48345

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4000117ae61e746524dabe61158c8b7566a4bebd2efa882cb3171e2a96bb720",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2012-07-02T20:17:50Z",
    "title_canon_sha256": "63194d29f141fd1aeed9ff1b9433c1e01410260c97276d16389c7e81470e6c3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0998",
    "kind": "arxiv",
    "version": 2
  }
}